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Arrojadoa

From Wikipedia, the free encyclopedia

Arrojadoa
Arrojadoa penicillata
Scientific classification Edit this classification
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Order: Caryophyllales
Family: Cactaceae
Subfamily: Cactoideae
Tribe: Cereeae
Subtribe: Cereinae
Genus: Arrojadoa
Britton & Rose, (1920)
Species

See text.

Synonyms[1][2]
  • Pierrebraunia Esteves
  • Arrojadoopsis Guiggi
  • Stephanocereus A.Berger

Arrojadoa is a genus of cacti, comprising 6 species and several varieties. It is named after the Brazilian botanist Miguel Arrojado Lisboa (1872–1932) who was superintendent of the Brazilian Railways at the time that Britton and Rose described the genus in 1920.[3] The genus occurs only in northern Brazil and is found at rocky places, under shrubs, which support their frail stalk. They are subtropical plants, with very little frost tolerance.

Description

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The species often have frail stalks that can be upright or procumbent, reaching 2 m high and about 2 to 5 cm thick. There are from 10 to 15 ribs, and ramifications are rare, and usually occur from the base.

The flowers are nocturnal and tube-like, measuring 1 to 3 cm in length and 0.5 to 1 cm in diameter. Flower colors can be pink or carmine. The fruit is berry-like, spherical with a maximal diameter of 1.5 cm, and pink or red when ripe.

Species

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As of September 2023, Plants of the World Online accepted the following species:[1]

Image Scientific name Distribution
Arrojadoa albiflora Brazil
Arrojadoa bahiensis Brazil
Arrojadoa dinae Brazil
Arrojadoa eriocaulis Buining & Brederoo Northern Minas Gerais – Brazil
Arrojadoa leucostele (Gürke) Anceschi & Magli Eastern Brazil
Arrojadoa marylanae Bahia, Minas Gerais - Brazil
Arrojadoa multiflora F.Ritter Bahia - Brazil
Arrojadoa olsthoorniana Hofacker, M.Machado & R.Pontes south Bahia - Brazil
Arrojadoa penicillata Bahia - Brazil
Arrojadoa rhodantha Bahia, Minas Gerais, Piaui - Brazil

Cultivation

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These tropical cacti are ideal for hanging baskets because of their snake like growth, but they are difficult to cultivate. They grow relatively rapidly in good conditions. Propagation is done more by seed than by cuttings. It grows best on slightly humid soil and with plenty of watering from spring to autumn. In winter it should be left without water and at a minimal temperature of 10 °C.[4]

References

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  1. ^ a b "Arrojadoa Britton & Rose". Plants of the World Online. Royal Botanic Gardens, Kew. Retrieved 29 September 2023.
  2. ^ Anderson 2001, p. 117
  3. ^ "On-line Guide to the positive identification of Members of the Cactus Family".
  4. ^ "Arrojadoa rhodantha".
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